DDR4-2666 non-ECC

Synology D4NESO-2666-4G is a 4 GB memory module for supported Synology NAS systems. Its DDR4 non-ECC, unbuffered SODIMM format identifies the module type for compatible devices.

Synology lists it for models including DS224+, DS423+, DS920+, DS720+, DS420+ and DS220+, as well as selected RackStation and other DiskStation systems. The confirmed model list also includes RS820RP+, RS820+, DS2419+II, DS2419+, DS1819+, DVA3219 and DS1618+.

This module provides 4 GB of memory capacity for a listed NAS model. Compatibility is model-specific; the supported devices named here are those published by Synology for this exact part number.